958-000281-003, March 2005)

Installation instructions20

NOTE: If name server zoning is implemented by port number, reconnect fiber optic cables that

were disconnected to perform the loopback test. A cable configuration change disrupts zone

operation and may incorrectly include or exclude a device from a zone.

7. If the port to be tested is shortwave laser, insert a multimode loopback plug into the port

receptacle. If the port to be tested is longwave laser, insert a single-mode loopback plug into

the port receptacle. If an entire UPM card is tested, insert an appropriate loopback plug in all

four port receptacles.

8. From the Maintenance menu, select Port Diagnostics.

The Port Diagnostics dialog box appears, as shown in Figure 8.

Figure 8 Port Diagnostics dialog box

9. To select a port or UPM card for test, perform one of the following:

• To select an individual port for test, type the port number in the Port Number field.

• To select a UPM card for test, type the port number of any of the four ports on the card in the

Port Number field, and then select All Ports On Card.

10.In the Diagnostics Test list box, select External Loopback.

11.Click Next.

Beaconing initiates for the port or UPM card selected for test.

In the Hardware View, a yellow triangle appears at the top of the UPM card. In the Port

Diagnostics dialog box, the following message appears:

Loopback plug(s) must be installed on ports being diagnosed.

12.Verify loopback plug(s) are installed and click Next.

The following message appears:

Verify selected ports are beaconing.

13.Verify beaconing is enabled, and then click Next.